Improvement in apparatus for breaking white-lead foawi



W. H. GREGG & APPARATUS FOR BREAKING WHITE LEAD FOAM. No. 181,668.

Patented Aug. 29, 1876.

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AT TEST:

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WILLIAM H. GREGG AND MICHAEL FORST, OF s'r.- LOUIS, MO., ASSIGNORS -'r0THE SOUTHERN WHITE LEAD COMPANY, OF SAME PLACE.

lMPROVEMENT INAPPARATUS FOR BREAKING WHITE-LEAD FOAM.

Specification forming part of Letters Patent No. ll,66, dated August 29,1876 application filed June 7, 1876:

To all whom may concern 7 Be it known that we, WILLIAM H. GREGG andMIOHAEL FORST, of St. Louis,,in the county of St. Louis and State ofMissouri, have invented a certain new and useful Apparatus for BreakingWhite-Lead- Foam, of

pulp white'lead. In this the foam is made to enter a descending pipe,discharging upon a line screen, where the foam is subjected to theaction of a jet of water, which descends upon it and carries it throughthe screen, thus breaking the bubbles. I

The drawing is a perspective section.

A is a pipe leading from the settling or foam tank or tanks, andcarrying therefrom thefoamthat forms in considerable quantity from theaction of grinding in water, the agitators in the rake-tubs, or othercauses. B is a line sieve or screen, which has raised edges or flanges Oto retain the foam or froth. D is a screen, beneath, B, which arrestsand breaks any small bubbles that may have passed through the firstscreen, and when the foam accumulates upon the screen D in greaterquantity than it can pass through, it overflows at the end d, and passesinto a pipe, E, from which. it is carried up to the pipe A to be workedover.' F is a flexible water pipeor hose thatinay be turned in anydirection, so

thatthe jet from the nozzle f may be made The water-pipe F may, ifpreferred, be fixed and arranged with a rose, or other jet, to dischargethe water upon the whole surface of the foam in sieve or screen B.

We do ot confine ourselves to two screens,

. B D, as My suitable number may be used in the vertical series.

We claim- 1. In an a iparatus for. breaking white-lead foam, the sc eenB, in combination with the foam duct A, substantially as set forth.

2. In an apparatus for breaking white-lead foam, the screen B, combinedwith the foamduct A and water-pipe F discharging therein,

' substantially as and for the purpose set forth.

3. In an apparatus for breaking white-lead foam, the combination withthe upper screen B I ofone or more screens, D, beneath it, with sideoverflows 11, as and for the purpose set forth.

WILLIAM H. GREGG.

MICHAEL FORST.

Witnesses:

SAML. Kmen'r, Roar. BURNS.

to play upon the foam in any part of the

